标签：sig 常用 max `` 11.2 pix triangle print 学习
1.动态显示图片
可以使用
plt.ion()
for..
plt.cla()
plt.plot()..
plt.ioff()
plt.show()
2.
随机选择n个数
numpy.random.choice(a, size=None, replace=True, p=None)
replace作用未知
3.
numpy中有一些常用的用来产生随机数的函数，randn()和rand()就属于这其中。
numpy.random.randn(d0, d1, …, dn)是从标准正态分布中返回一个或多个样本值。
numpy.random.rand(d0, d1, …, dn)的随机样本位于[0, 1)中。
1 import numpy as np 2 arr1 = np.random.randn(2,4) 3 print(arr1) 4 arr2 = np.random.rand(2,4) 5 print(arr2)
结果
1 [[-1.03021018 0.5197033 0.52117459 -0.70102661] 2 [ 0.98268569 1.21940697 -1.095241 -0.38161758]] 3 ****************************************************************** 4 [[ 0.19947349 0.05282713 0.56704222 0.45479972] 5 [ 0.28827103 0.1643551 0.30486786 0.56386943]]
4.np.random.shuffle 打乱作用
5.numpy.random.randint(low, high=None, size=None, dtype=‘l‘)
Ifhigh is None (the default), then results are from [0, low).
6.numpy.argmax(a, axis=None, out=None)
不添加时全部元素的最大值，也可指定axis值
7.关于plt.plot中画图参数解析
================ ===============================
character description
================ ===============================
``‘-‘`` solid line style
``‘--‘`` dashed line style
``‘-.‘`` dash-dot line style
``‘:‘`` dotted line style
``‘.‘`` point marker
``‘,‘`` pixel marker
``‘o‘`` circle marker
``‘v‘`` triangle_down marker
``‘^‘`` triangle_up marker
``‘<‘`` triangle_left marker
``‘>‘`` triangle_right marker
``‘1‘`` tri_down marker
``‘2‘`` tri_up marker
``‘3‘`` tri_left marker
``‘4‘`` tri_right marker
``‘s‘`` square marker
``‘p‘`` pentagon marker
``‘*‘`` star marker
``‘h‘`` hexagon1 marker
``‘H‘`` hexagon2 marker
``‘+‘`` plus marker
``‘x‘`` x marker
``‘D‘`` diamond marker
``‘d‘`` thin_diamond marker
``‘|‘`` vline marker
``‘_‘`` hline marker
================ ===============================
The following color abbreviations are supported:
========== ========
character color
========== ========
‘b‘ blue
‘g‘ green
‘r‘ red
‘c‘ cyan
‘m‘ magenta
‘y‘ yellow
‘k‘ black
‘w‘ white
========== ========
标签：sig 常用 max `` 11.2 pix triangle print 学习
原文地址：http://www.cnblogs.com/hao-sir/p/7892643.html
